Biomass is living or recently dead biological matter that can be used for fuel or industrial production.

Nuclear power comes from the process of nuclear fission, or the splitting of atoms. The resulting controlled nuclear chain reaction creates heat, which is used to boil water, produce steam, and drive turbines that generate electricity.

Due to its high energy density, easy transportability, and relative abundance, oil has been the world’s leading source of energy since the mid-1950s.